Revert "ghostscriptX: update from 9.06 to 9.14, potentially fixes CVE-2012-4405"

This reverts commit 13fab57d.

Hopefully fixes the printing tests at
http://hydra.nixos.org/build/14952070/log/raw ; if not, it's probably
gutenprint although I doubt:

client# lp: Unsupported document-format "application/pdf".